1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 59Get this manual
ENGINE SERVICING (VVANKEL IM914B) Permissible Wear: 0.0157 in= 0.4 mm (at measuring positions a, and c) Maximum difference of measurement of positions and c: 0.0078 in(0.2 mm)Permissible unevenness 0.00078 in(0.02 mm) Permissible wear up to -0.00078 in(-0.02 mm) dH
Apex Seal Springs, Sealing Pin Springs and Sealing Strip Springs must be replaced after every disassembly of the enginePermissible unevenness 0.0039 in(0.1 mm) Permissible wear up to -0.0078 in(-0.2 mm)
Rotor Casing
The rotor casing must be replaced, when the elnisil coating of the rotor casing has been damaged from dirt or foreign bodies or when cracks (not very fine cracks) are perceptibleThe wear of the rotor casing is very minor, when the above mentioned deficiencies are not presentNOTE: The sealing elements and their springs must also be replaced when replacing the rotor casingSealing Pins
Replacing the Cylindrical Roller Bearing, Pinion Gear and Support Ring